Definition
A Terminal Arrival Area is a designated airspace associated with an RNAV (area navigation) instrument approach procedure that provides a transition from the en route structure to the approach. It is typically depicted on the approach chart as one or more sectors arranged around an initial approach fix, each with its own published minimum altitude. Pilots arriving within a TAA sector may descend to the charted altitude and proceed direct to the associated initial approach fix to begin the approach.
Plain English
A TAA is a piece of airspace around an instrument approach that tells you the lowest safe altitude you can fly while heading toward the start of the approach, depending on the direction you're coming from.
Context Anchor
Seen on some instrument approach charts, especially area navigation or GPS-based approaches, before the final part of the approach begins.
Derivation
"Terminal" here means the airspace near an airport (the end of the en route phase). "Arrival" refers to aircraft inbound to land. So the name describes exactly what it is: a piece of arrival airspace near the airport's terminal area.
Why Pilots Care
Allows RNAV-equipped aircraft to transition from en route to approach without radar vectors, reducing workload and radio traffic.
Intuition Check
Do not read “terminal” here as the airport building. A Terminal Arrival Area is a charted flight area near the destination airport, used to enter an instrument approach safely.
Example Sentence 1
Approaching from the northwest, the pilot entered the TAA, descended to the charted sector altitude, and proceeded direct to the initial approach fix.
Example Sentence 2
ATC cleared the flight direct to a waypoint in the TAA to begin the published arrival procedure.